156817

Properties

Appears in sequences

• a(n) = index of first appearance of n in A096862.at n=24A097008
• Primes p of the form 4*n^2 + 1 such that 4*p^2+1 is also prime.at n=9A121834
• Primes associated with A127435.at n=21A127436
• Smaller of two consecutive prime numbers such that p1*p2*d - d = average of twin prime pairs, d (delta) = p2 - p1.at n=24A153378
• Primes of the form 9*n^2 + 1.at n=20A156226
• Primes of the form (p + q)^2 + 1, where p and q are consecutive primes.at n=11A244095
• Primes that are the square of the sum of a twin prime pair plus 1.at n=7A261889
• Löschian numbers (A003136) of the form k^2+1.at n=31A271184
• Numbers n for which 18n+1, 18n+5, 18n+7, 18n+11, 18n+13 and 18n+17 are primes.at n=2A309871
• Numbers k such that A124440(k) is a square.at n=15A341032
• Smallest prime p == 1 (mod 8) such that Q(sqrt(p)) has class number 2n+1.at n=38A355876
• Prime numbersat n=14421